Method for preventing big crickets from harming eucalyptus seedlings

Abstract

The invention relates to the technical field of eucalyptus cultivation. The invention provides a method for preventing large crickets from harming eucalyptus seedlings, which comprises the following steps of: carrying out eucalyptus afforestation at proper time, and sleeving the base parts of the eucalyptus seedlings with protective containers after afforestation. The method is easy to operate, materials are simple and easy to obtain, timely afforestation is matched with use of a protection container, harm of the big crickets to newly-built eucalyptus seedlings can be effectively reduced, the afforestation survival rate is increased, and the afforestation cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of eucalyptus cultivation, and particularly relates to a method for preventing eucalyptus seedlings from being damaged by big crickets. BACKGROUND

[0002] Eucalyptus is a general term for Myrtaceae, Umbellatae and Eucalyptus species, and there are currently 945 classification groups. Eucalyptus is one of the three major fast-growing timber tree species in the world, and has become a widely cultivated exotic tree species worldwide. At present, the main planting varieties of eucalyptus afforestation are Eucalyptus urophylla, Eucalyptus grandis, Eucalyptus macrorhyncha and Eucalyptus torilis. The main cultivation target of Eucalyptus urophylla (Eucalyptus grandis) is plywood and paper pulp material forest, and Eucalyptus macrorhyncha and Eucalyptus torilis are directional cultivation for medium and large diameter solid wood material forest. Eucalyptus has become the main growth pole of forest stock volume and timber yield in some areas.

[0003] However, in the process of eucalyptus afforestation, the occurrence of diseases and pests is becoming more and more serious, among which the main pest, big cricket, bites and breaks the main stem of newly planted eucalyptus seedlings, seriously affecting the survival rate of afforestation and increasing the cost of forest management. The big cricket is a cricket in the order of Orthoptera, and the adult body length is 4-5 cm, with yellow-brown or dark brown color. The overwintering nymphs of the big cricket start to move in February-March every year, the adults appear in April-May, and the adults are in full swing in May-June, and the damage becomes more and more serious with time. The big cricket hides in the cave during the day, and moves out of the cave at night to damage plants, and can move and feed within a range of more than 10 meters around the cave. When damaging newly planted eucalyptus seedlings, the main stem part of the seedling is bitten and broken. When the big cricket damages larger seedlings, there are obvious bite marks on one side of the stem, with a length of about 0.5 cm, and when the bite exceeds 1 / 2 of the diameter of the stem, it causes breakage; when it damages smaller seedlings, it directly bites and breaks the stem and feeds on the stem or leaves.

[0004] Studies have shown that the damage rate of big crickets to newly afforested eucalyptus seedlings can reach 0.2%-35%, and traditional control measures mainly use chemical drugs, which can achieve certain effect, but using chemical drugs can cause environmental pollution and other problems. It is very urgent to explore green control technology for big crickets and improve the survival rate of afforestation. SUMMARY

[0005] The purpose of the present application is to provide a method for preventing eucalyptus seedlings from being damaged by big crickets, effectively reducing the damage of big crickets to newly planted eucalyptus seedlings, and improving the survival rate of afforestation.

[0006] In order to achieve the above-mentioned purpose of the application, the present application provides the following technical solutions:

[0007] The present application provides a method for preventing eucalyptus seedlings from being damaged by big crickets, comprising the following steps: afforestation of eucalyptus in a timely manner, and sleeving a protection container around the base of the eucalyptus seedling after afforestation.

[0008] As a preference, the eucalyptus afforestation time is early to middle March.

[0009] As a preference, the protective container is a circular truncated cone, the height of the protective container is 12-15 cm, the diameter of the large opening of the protective container is 8-11 cm, and the diameter of the small opening is 4-7 cm.

[0010] As a preference, the protective container is used with the large opening downward and inserted into the soil at a depth of 0.5-1.5 cm.

[0011] As a preference, the protective container is a plastic cup or a paper cup.

[0012] The present application provides a method for preventing eucalyptus seedlings from being damaged by large crickets, comprising the following steps: afforesting eucalyptus in time and sleeving the base of the eucalyptus seedlings with a protective container after afforestation. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Sleeving a paper cup for eucalyptus seedlings for prevention;

[0014] Figure 2 Sleeving a plastic cup for eucalyptus seedlings for prevention;

[0015] Figure 3 Applying poison bait for eucalyptus seedlings for killing;

[0016] Figure 4 Taking no prevention measures for eucalyptus seedlings. DETAILED DESCRIPTION

[0017] The present application provides a method for preventing eucalyptus seedlings from being damaged by large crickets, comprising the following steps: afforesting eucalyptus in time and sleeving the base of the eucalyptus seedlings with a protective container after afforestation.

[0018] In the present application, the eucalyptus afforestation time is preferably early to middle March.

[0019] In the present application, the protective container is preferably a circular truncated cone, the height of the protective container is preferably 12-15 cm, further preferably 12-13 cm, the diameter of the large opening of the protective container is preferably 8-11 cm, further preferably 9-10 cm, and the diameter of the small opening is preferably 4-7 cm, further preferably 5-5.5 cm.

[0020] In the present application, the protective container is preferably used with the large opening downward and inserted into the soil at a depth of 0.5-1.5 cm, further preferably 1 cm.

[0021] In the present application, the protective container is preferably a plastic cup or a paper cup, further preferably a paper cup.

[0022] The technical solutions provided by the present application will be described in detail below in conjunction with the embodiments, but they should not be understood as limiting the scope of protection of the present application.

[0023] Example 1 Cricket control technology

[0024] In order to reduce the harm of large crickets to newly planted eucalyptus seedlings and improve the survival rate of afforestation, on the one hand, try to choose early spring planting before the end of March, stagger the peak harm period of large crickets; on the other hand, take control technical measures.

[0025] The traditional control method mainly adopts chemical control measures such as laying poison bait to kill or spraying pesticide to drive away, etc., the effect is not obvious enough and easy to cause pesticide residue pollution of the environment. Through long-term repeated experiments, the present application adopts four different control measures for eucalyptus seedlings afforested in March, April and May, and achieves ideal control effect. The four different control measures and methods are as follows, treatment 1: seedling base stem is sleeved with a paper cup. After cutting off the bottom of a paper soybean milk cup (the upper and lower end diameters and height are 8.9 cm x 5.8 cm x 13.2 cm respectively), immediately sleeve the base of each seedling with the paper cup after the eucalyptus seedling afforestation is completed, the large diameter end of the cup is downward, and the paper cup is embedded in the soil about 1 cm deep, to prevent the lower end from being blown away by light wind, causing no close contact with the soil and allowing large crickets to enter Figure 1 ); treatment 2: seedling base stem is sleeved with a plastic cup. After cutting off the bottom of a larger size plastic cup (the upper and lower end diameters and height are 9.5 cm x 5.5 cm x 13.5 cm respectively), immediately sleeve the base of each seedling with the plastic cup after the eucalyptus seedling afforestation is completed, the large diameter end of the cup is downward, and the plastic cup is embedded in the soil about 1 cm deep, to prevent the lower end from being blown away by light wind, causing no close contact with the soil and allowing large crickets to enter Figure 2 ); treatment 3: seedling is laid with poison bait to kill. After 90% of the dimethoate crystal is dissolved in water at a ratio of 1:10, then 100 parts of fried wheat bran and an appropriate amount of brown sugar are added and fully mixed, about 5g of poison bait is scattered every 8 meters in the afforested land to kill Figure 3 ); treatment 4: control, no control measures are taken after new afforestation Figure 4 ). The control test results are shown in Table 1.

[0026] Table 1 shows that Treatment 1 had the lowest cricket damage rate at 0.3%, followed by Treatment 2 at 0.7%, while Treatment 4 had the highest damage rate at 23.5%. Treatments 1 and 2 showed damage rates 98.7% and 97.0% lower than Treatment 4, respectively, demonstrating a significant control effect. Comparing damage rates at different afforestation times, mid-May afforestation had the highest damage rate, while mid-March afforestation had the lowest. Treatment 4 showed that mid-March afforestation reduced the cricket damage rate by 49.1% and 30.2% compared to mid-May and mid-April afforestation, respectively, indicating that early spring afforestation is beneficial for preventing cricket damage and improving survival rates. Analysis of seedling growth shows that seedling height varied significantly among the four treatments, ranging from 92.7cm to 93.3cm, indicating that none of the four treatments affected the normal growth of the afforested seedlings.

[0027] Table 1. Survey on the control measures and effects of eucalyptus seedlings on the damage caused by giant crickets.

[0028]

[0029] Prevention and control cost calculation

[0030] As shown in Table 2, among the four treatments, treatment 1 had the lowest prevention and control cost, totaling 426.5 yuan / hm. -2 The treatment was performed twice, with a total cost of 461.0 yuan. -2 The highest prevention and control cost was for treatment 3, with a total cost of 649.2 yuan / hm. -2 .

[0031] Treatment 1 and Treatment 2 reduced the prevention and control costs by 34.3% and 29.0% respectively compared to Treatment 3, indicating that Treatment 1 and Treatment 2 have low prevention and control costs and are suitable for application in production. However, Treatment 2 uses plastic cups, which are not easily degraded and will cause environmental pollution, while Treatment 1 uses paper cups, which degrade naturally after six months and will not leave any residue that will affect the ecological environment. Therefore, Treatment 1 is the best method.

[0032] Table 2. Cost Calculation for Controlling Giant Crickets with Eucalyptus Seedlings

[0033] Note: Paper cups are 0.11 yuan each, plastic cups are 0.14 yuan each, and wheat bran is 1.5 yuan per 500g.

[0034] In conclusion, among the four treatments for preventing damage to eucalyptus seedlings by giant crickets, the method of covering the base of the seedling with a paper cup (treatment 1), i.e., using a paper soy milk cup (with a top and bottom diameter of 8.9cm × 5.8cm × 13.2cm and a height of 13.2cm), cutting off the bottom, and immediately placing the bottom-less paper cup on the base of each seedling after afforestation, with the larger diameter end of the cup facing down and embedded about 1cm deep in the soil, showed the best control effect. The damage rate of giant crickets was only 0.3%, a reduction of 98.7% compared to treatment 4 (CK), and the control cost was only 65.7% of that of treatment 3. The seedling height of the four treatments ranged from 92.7cm to 93.3cm, with no significant difference, and none of them affected the normal growth of the afforested seedlings. This method can be promoted and applied in production.

[0035] Afforestation at different times from March to May showed that the cricket damage rate was 49.1% lower when afforestation was carried out in March than when afforestation was carried out in mid-May. This indicates that early spring afforestation is beneficial for preventing cricket damage and improving the survival rate. Therefore, where conditions permit, afforestation should be carried out as early as possible to reduce cricket damage.

[0036] As can be seen from the above embodiments, the present invention provides a method for preventing damage to eucalyptus seedlings by giant crickets, comprising the following steps: timely eucalyptus afforestation, and after afforestation, covering the base of the eucalyptus seedlings with a protective container. The method of the present invention is simple to operate, uses readily available materials, and by combining timely afforestation with the use of a protective container, it can effectively reduce the damage of giant crickets to newly planted eucalyptus seedlings, improve the survival rate of afforestation, and reduce afforestation costs.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preventing damage to eucalyptus seedlings by large crickets, characterized in that, The process includes the following steps: timely eucalyptus afforestation, and after afforestation, using protective containers to cover the base of the eucalyptus seedlings.

2. The method according to claim 1, characterized in that, The eucalyptus planting season is from early to mid-March.

3. The method according to claim 2, characterized in that, The protective container is frustum-shaped, with a height of 12-15cm, a large opening diameter of 8-11cm, and a small opening diameter of 4-7cm.

4. The method according to claim 3, characterized in that, When in use, the protective container is inserted into the soil at a depth of 0.5 to 1.5 cm with the wider end facing down.

5. The method according to any one of claims 1 to 4, characterized in that, The protective container is a plastic cup or a paper cup.

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